Steam boiler



July 24, 1928. 1,677,969

n. s. JACOBUS STEAM B0 ILER Filed June 1. 1922 a. pg"

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70 INVENTOR Jfi/QM ATTORINEYS bodying my invention; Figi? Patented July 24, 1928.

UNITED STATES 1,677,969 PATENT OFFICE.

DAVID S. JAOOB'D'S, OF JERSEY CITY, NEW JERSEY, ASSIGNOB. TO THE BAIBCOCK & WILCOX COMPANY, OF BAYONNE, NEW JERSEY, A. CORPORATION 01 NEW JERSEY.

STEAM BOILER.

Application filed June 1,

My invention particularly relates to a. steam boiler which may be used either n waste heat work or for direct firing, and in which a high rate of heat transfer is obtained.

I am making no claim to certain drum and tube arrangements shown in the drawings, since this constitutes subject matter of my copending application, Serial No. 330,358, for waste heat boilers, which was filed m the Patent Oflice on or about June 21, 1920.

My invention will best be understood by reference to the accompanying drawings, in which I have illustrated my invention in conjunction with a boiler adapted for waste heat work, and in which Figure 1 1s a longitudinal sectional view of a steam boiler em- 2 is a vertical transverse section through ig. 1, and Fig. 3 is a sectional plan view showing one of the lower mud drums.

Referring, now, to the drawin s, 10 1s an upper steam and water drum, an 11 and 12 two lower mud drums, which may be aligned as illustrated, connected to the steam and water drum b banks of boiler tubes 13 and economizer tu s 14, respectively, the tubes being arranged in staggered rows longitudinally of the boiler'and 1n straight rows tranversely thereof, the tubes being bent at their ends where they enter the drums. The two lower aligned drums 11 and 12 are preferably connected through a by-pass 11 provided with a valve 11 by which the flow from the one drum to the other may be regulated and by which the extent of communication between said drums may be varied. The by-pass is referably curved and leads from the side 0 one of the drums to the side of the other, in order that a difierence in the relative movements of the lower drums caused by a difference in expansion of the tubes connected thereto would not lead to leakage in the connections between the by-pass and the respective drums. The tubes are arranged lon itudinally of the drums in groups, prefera ly of two, which are spaced apart to afford access for removal and renewal of-the tubes and for adjustment ofthe scrapers, when 1922. Serial No. 585,062.

be obtained in the manufacture of zinc, and carrying zinc oxide dust-are conducted to the boiler by a flue 18, which directs the gases over the tubes 13 and 14. From the boiler tubes 13 the gases pass over the econono feed water inlet 21 is connected to the mud a5 drum 12 of the economizer. By placing the dry pipe and steam outlet 17 at the rear end, with respect to the flow of gases, of the steam and waterdrum, steam of a maximum degree of dryness is obtained, as the water in the/I0 drum is in the most quiescent state and at the lowermost level at this point. Beneath the lower drums 11 and 12 are arran ed pockets having hopper-shaped tops, which are provided for the reception of zinc oxide or other deposit which may collect on the tubes and which may ,be removed by the scrapers, or the steam soot-blowing elements, or in any desired manner.

The opening in the by-pass 11 will ordinarily be kept closed by the valve 11". In case the valve is opened and the two drums placed in communication with each other, the economizer section will be connected to the general circulation of the boiler and the economizer tubes will become boiler tubes. The use of the by-pass 11' with its regulating valve provides a means of connecting the economizer with the general circulation of the boiler, thereby converting the economizer no section to a boiler section. In some instances, feed water will cause corrosion in the economizer elements and not in the boiler. Should this be the case, the feature of con verting the economizer tubes to boiler tubes is a most useful one, as the economizer can be converted and made part of the boiler and the corrosion thereby overcome until such a time that the feed water can be treated so as to make it suitable for use in an economo mizer.

In the boilers shown, the gases make a single pass across the boiler tubes, thereby eliminating the draft resistance due to changes in the direction of flow of the gases which occur in boilers provided with bafiies. The tubes are so proportioned and spaced that the flow area over the tubes, between and around the tubes, in combination with the staggered arrangement of the tubes, gives no a high rate of heat transfer from the hot gases to the tubes. A maximum heat transfer is thereby secured, with minimum draft resistance, and the arrangement is particularly adaptable for securing high efliciencies.

I claim:

1. In a steam boiler, an upper steam and water drum, two physically distinct lower mud drums, means for introducing feed water to one of said mud drums, economizer tubes connecting said steam and water drum to the feed-water drum, boiler tubes connecting said steam and water drum to the other mud drum, and means for directing heated gases over the boiler tubes and then over the economizer tubes.

2. In a steam boiler, an upper steam and water drum, two physicall distinct lower mud drums parallel to said steam and water drum, a group of boiler tubes connecting said steam and water drum to one of said mud drums, and a group of tubes forming an economizer section connecting the other mud drum to the steam and water drum, a flue in which said groups of tubes are located, theeconomizer section being disposed at the coolest portions of the flue and the heated gases passing successively over the boiler tubes and then over the economizer tubes.

3. In a steam boiler, an upper steam and water drum, two physically distinct lower mud drums parallel to said steam and water drum, a group of boiler tubes connecting said steam and water drum to one of said mud drums, a group of tubes forming an economizer section connecting the other mud drum to the steam and water drum, a flue in which said groups of tubes are located, the economizer section being disposed at the coolest portions of the flue, and the heated gases passing successively over the boiler tubes and then over the economizer tubes and a feed water inlet to the mud drum of the economizer section.

4. In a steam boiler, an upper steam and water drum, two lower mud drums, water tubes connecting said steam and water drum to the respective mud drums to form an evaporating section and an economizer section, respectively, means for directing gases successively over the evaporating section and then over the economizer section, means for providing a communication between said mud drums, and means for varying the extent of said communication.

5. In a steam boiler, an upper steam and water drum, two lower aligned mud drums, Water tubes connecting said steam and water drum to the respective mud drums to form an evaporating section and an economizer section, respectively, means for directing gases successively over the evaporating section and then over the economizer section and a valved pipe connecting said mud drums.

6. In a steam boiler, an upper steam and water drum, two lower aligned mud drums, water tubes connecting said steam and water drum to the respective mud drums to form an evaporating section and an economizer section, respectively, means for directing gases successively over the evaporating section and then over the economizer section, and a valved pipe connecting the side of one mud drum to the side of the other mud drum.

7. In a steam boiler, an u per steam and water drum, two lower mu drums, Water tubes connecting said steam and water drum to the respective mud drums to form an evaporating section and an economizer section, respectively, means for directing waste heat gases successively over the evaporating section and then over the economizer section, a curved ipe provided with a valve connecting said mud drums, said pipe and the valve therein providing a variable communication between said mud drums.

DAVID S. J ACOBUS.

CERTIFICATE OF CORRECTION.

Patent No. l, 677, 969.

Granted July 24, 1928, to

DAVID S. JACOBUS.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows:

Page 2, lines 8, l8, and

32, claims 1, 2, and 3, respectively, strike out the words "physically distinctlower" and insert instead "lower physically distinct and substantially aligned";

and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 28th day of August, A. D. 1928.

(Seal) M. J. Moore, Acting Commissioner of Patent! a high rate of heat transfer from the hot gases to the tubes. A maximum heat transfer is thereby secured, with minimum draft resistance, and the arrangement is particularly adaptable for securing high efliciencies.

I claim:

1. In a steam boiler, an upper steam and water drum, two physically distinct lower mud drums, means for introducing feed water to one of said mud drums, economizer tubes connecting said steam and water drum to the feed-water drum, boiler tubes connecting said steam and water drum to the other mud drum, and means for directing heated gases over the boiler tubes and then over the economizer tubes.

2. In a steam boiler, an upper steam and water drum, two physicall distinct lower mud drums parallel to said steam and water drum, a group of boiler tubes connecting said steam and water drum to one of said mud drums, and a group of tubes forming an economizer section connecting the other mud drum to the steam and water drum, a flue in which said groups of tubes are located, theeconomizer section being disposed at the coolest portions of the flue and the heated gases passing successively over the boiler tubes and then over the economizer tubes.

3. In a steam boiler, an upper steam and water drum, two physically distinct lower mud drums parallel to said steam and water drum, a group of boiler tubes connecting said steam and water drum to one of said mud drums, a group of tubes forming an economizer section connecting the other mud drum to the steam and water drum, a flue in which said groups of tubes are located, the economizer section being disposed at the coolest portions of the flue, and the heated gases passing successively over the boiler tubes and then over the economizer tubes and a feed water inlet to the mud drum of the economizer section.

4. In a steam boiler, an upper steam and water drum, two lower mud drums, water tubes connecting said steam and water drum to the respective mud drums to form an evaporating section and an economizer section, respectively, means for directing gases successively over the evaporating section and then over the economizer section, means for providing a communication between said mud drums, and means for varying the extent of said communication.

5. In a steam boiler, an upper steam and water drum, two lower aligned mud drums, Water tubes connecting said steam and water drum to the respective mud drums to form an evaporating section and an economizer section, respectively, means for directing gases successively over the evaporating section and then over the economizer section and a valved pipe connecting said mud drums.

6. In a steam boiler, an upper steam and water drum, two lower aligned mud drums, water tubes connecting said steam and water drum to the respective mud drums to form an evaporating section and an economizer section, respectively, means for directing gases successively over the evaporating section and then over the economizer section, and a valved pipe connecting the side of one mud drum to the side of the other mud drum.

7. In a steam boiler, an u per steam and water drum, two lower mu drums, Water tubes connecting said steam and water drum to the respective mud drums to form an evaporating section and an economizer section, respectively, means for directing waste heat gases successively over the evaporating section and then over the economizer section, a curved ipe provided with a valve connecting said mud drums, said pipe and the valve therein providing a variable communication between said mud drums.

DAVID S. J ACOBUS.

CERTIFICATE OF CORRECTION.

Patent No. l, 677, 969.

Granted July 24, 1928, to

DAVID S. JACOBUS.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows:

Page 2, lines 8, l8, and

32, claims 1, 2, and 3, respectively, strike out the words "physically distinctlower" and insert instead "lower physically distinct and substantially aligned";

and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 28th day of August, A. D. 1928.

(Seal) M. J. Moore, Acting Commissioner of Patent! 

